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Lightning flashover risk evaluation method for power system

A lightning flashover and risk assessment technology, applied in the field of assessment, can solve the problem of low accuracy

Active Publication Date: 2016-03-23
YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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Problems solved by technology

[0005] The present invention provides a lightning flashover risk assessment method for a power system to solve the problem of low accuracy of existing lightning flashover risk assessment methods

Method used

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  • Lightning flashover risk evaluation method for power system
  • Lightning flashover risk evaluation method for power system
  • Lightning flashover risk evaluation method for power system

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Embodiment Construction

[0020] Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the present invention. Rather, they are merely examples of means consistent with aspects of the invention as recited in the appended claims.

[0021] Each embodiment in this specification is described in a progressive manner, the same and similar parts of each embodiment can be referred to each other, and each embodiment focuses on the differences from other embodiments.

[0022] Please refer to figure 1 , which is a flow chart of a method for assessing the lightning flashover risk of a power system provided in an embodiment of the present invention. ...

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Abstract

The invention provides a lightning flashover risk evaluation method for a power system. The method comprises: obtaining a trip-out rate n of a line; obtaining an importance degree k1 of the line in a same-level power grid; obtaining a probability k2 of unsuccessful re-switch-on of the line which is tripped out due to lightning; and according to n, k1 and k2, establishing a regional power grid lightning flashover risk model R (R=nXk1Xk2) and obtaining a lightning flashover risk R of a power transmission grid. According to the scheme, the influence of each edge on network performance is measured based on edge betweenness and then a vulnerable region influencing the performance of the power transmission grid is analyzed, so that a lightning protection scheme of the line is designed according to local conditions, the protection of the vulnerable region is properly enhanced, and the reliability and stability of power supply are improved; and meanwhile, comprehensive evaluation is performed in combination with the trip-out rate n of the line and the probability k2 of unsuccessful re-switch-on of the line which is tripped out due to lightning, so that the lightning flashover risk of the power system can be evaluated more accurately. The method has important significances for reducing huge losses of the power grid due to faults of important lines.

Description

technical field [0001] The invention relates to the field of evaluation methods, in particular to a method for evaluating the risk of lightning flashover in a power system. Background technique [0002] Power grid is an important infrastructure in modern society, and the safe operation of power grid has increasingly become an effective guarantee for the efficient operation of political and economic life in modern civilized society. However, the collapse of the power grid and blackouts have always existed along with the development of the power grid and society. In recent years, there have been many blackouts in power systems all over the world, which have brought huge losses to society and economy. The frequent occurrence of large-scale blackouts has attracted great attention from the scientific and engineering circles. Analyzing the internal causes of large-scale blackouts and finding effective ways to prevent them have become hot topics. [0003] According to the N-1 saf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00
CPCG16Z99/00
Inventor 沈鑫闫永梅赵丹妮李月梅曹敏周年荣张林山黄星李鹏王昕毛天常亚东
Owner YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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